title: Contingent valuation with an open-ended follow-up question: a test of scope effects.
abstract: It has been suggested that an open-ended follow-up question should be added to the binary contingent valuation question. Before this is generally recommended, it is important to evaluate the properties of such follow-up questions. Using a split sample approach, we test whether the open-ended follow-up is sensitive to the scope of the commodity being valued. No significant scope effects were detected. It is concluded that the results obtained do not support the use of an open-ended follow-up in contingent valuation applications.
authors.forename: B
authors.initials: B
authors.lastname: Kartman
authors.forename: N O
authors.initials: NO
authors.lastname: Stålhammar
authors.forename: M
authors.initials: M
authors.lastname: Johannesson
mesh_terms: D004942:Esophagitis, Peptic / Q000191:economics* / Q000628:therapy; D005382:Financing, Personal; D006292:Health Priorities / Q000191:economics*; D006801:Humans; D016018:Least-Squares Analysis; D016013:Likelihood Functions; D016015:Logistic Models; D017059:Models, Econometric; D013548:Sweden